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      为什么直升机有两个螺旋桨

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      为什么直升飞机要有两个螺旋桨(直升机两个螺旋桨有什么用处)

      为什么直升飞机要有两个螺旋桨(直升机两个螺旋桨有什么用处)

      最佳答案保证机体稳定不发生转动并实现航向的操作。直升机是一种由至少二个或多个水平旋转的旋翼提供向上升力和推进力而进行飞行的航空器,由西科斯基于1939年9月发明,可以广泛的应用在运输、巡逻、旅游、救护...
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